public class ArrayDemo1 {
    public static void main(String[] args) {

        String[] bookTitles = {"Java编程基础", "数据结构与算法", "Python入门", "数据库原理", "计算机网络"};


        System.out.println("图书馆共有 " + bookTitles.length + " 本图书：");


        for (int i = 0; i < bookTitles.length; i++) {
            System.out.println("第 " + (i + 1) + " 本：" + bookTitles[i]);
        }
    }
}